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#1
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
My parents have a Gateway PC that is about 4 years old. The fan is
quite noisy and the monitor displays somewhat faint wavy gray lines that can get annoying. I tried the monitor and cable with my laptop and there were no wavy lines on the screen. So apparently the cause is on the Gateway PC motherboard (mini case has no graphics card). I am wondering if the bad fan could be causing electromagnetic interference that could cause the way lines problem. The fan noise by itself doesnt really warrant the replacement of the power supply (about $60). |
#2
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
Stick a pencil into fan to stop it. Do lines go away?
New fan can be purchased from Allied Electronics, Newark Electronics, Digikey, Mouser, or Jamesco - online. No need to replace a whole power supply only because of an inferior and replaceable fan. Even buy a failed Gateway (Newton?) power supply to use that fan. wrote: My parents have a Gateway PC that is about 4 years old. The fan is quite noisy and the monitor displays somewhat faint wavy gray lines that can get annoying. I tried the monitor and cable with my laptop and there were no wavy lines on the screen. So apparently the cause is on the Gateway PC motherboard (mini case has no graphics card). I am wondering if the bad fan could be causing electromagnetic interference that could cause the way lines problem. The fan noise by itself doesnt really warrant the replacement of the power supply (about $60). |
#3
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
wrote in message oups.com... My parents have a Gateway PC that is about 4 years old. The fan is quite noisy and the monitor displays somewhat faint wavy gray lines that can get annoying. I tried the monitor and cable with my laptop and there were no wavy lines on the screen. So apparently the cause is on the Gateway PC motherboard (mini case has no graphics card). I am wondering if the bad fan could be causing electromagnetic interference that could cause the way lines problem. The fan noise by itself doesnt really warrant the replacement of the power supply (about $60). I would check the frequency settings on the display adapter and try alternatives ... default is probably 60hz and the higher frequencies can sometimes get rid of flicker. Geoff |
#5
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
Agreed. $60 for a replacement power supply is excessive.
Fan noise is a sign of potential failure, due to dust and dirt that have gotten into the rotating parts. A blast of compressed air may dislodge the dust and dirt, and make the fan quieter and more reliable. Honestly, it is just not worth all the effort to replace a fan inside a power supply, despite what other postings claim. If you cannot fix the fan noise problem easily, and you can provide the dimensions of the power supply (and the pattern of the screw hole mountings), I may have a suitable and inexpensive replacement. As for the monitor, if the system was set up initially with a 60Hz refresh rate, this ought to be changed in the Display properties of Control Panel. Unless the monitor is very old, it should operate at 70Hz minimum, a refresh rate much more pleasant to view. If a different refresh rate does not fix the problem, look for other nearby sources of electrical interference. I once had a client whose monitor began to malfunction whenever a nearby air conditioner kicked in. The fan motor is a highly unlikely cause of interference with the monitor. .... Ben Myers On 30 Nov 2005 22:58:04 -0800, wrote: My parents have a Gateway PC that is about 4 years old. The fan is quite noisy and the monitor displays somewhat faint wavy gray lines that can get annoying. I tried the monitor and cable with my laptop and there were no wavy lines on the screen. So apparently the cause is on the Gateway PC motherboard (mini case has no graphics card). I am wondering if the bad fan could be causing electromagnetic interference that could cause the way lines problem. The fan noise by itself doesnt really warrant the replacement of the power supply (about $60). |
#6
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
In article .com,
says... My parents have a Gateway PC that is about 4 years old. The fan is quite noisy and the monitor displays somewhat faint wavy gray lines that can get annoying. I tried the monitor and cable with my laptop and there were no wavy lines on the screen. So apparently the cause is on the Gateway PC motherboard (mini case has no graphics card). I am wondering if the bad fan could be causing electromagnetic interference that could cause the way lines problem. The fan noise by itself doesnt really warrant the replacement of the power supply (about $60). It is most likely the fan causing the problem. If you're happy opening up the PSU, replacing the fan is a fairly easy thing to do and they only cost a few $$. -- Conor "You're not married, you haven't got a girlfriend and you've never seen Star Trek? Good Lord!" - Patrick Stewart, Extras. |
#7
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
The wavy lines you describe is a common failure with the Brookings
motherboard in Gateway flex systems. Is your machine one of those tiny, USB only flex atx systems? When I was at Gateway I replaced those boards for that issue, bad modems (integrated), broken USB ports and bad capacitors all the time. You can get a replacement pretty cheap from these guys: http://www.pcpartsohio.com/GatewayCa...subcatego ry5 Just be aware that there are two versions of this board, one with a parallel port and one without. As for the power supply, it isn't too hard to replace the fan in them but the machine will take any standard micro-atx power supply. They are about $25 shipped from newegg.com wrote in message oups.com... My parents have a Gateway PC that is about 4 years old. The fan is quite noisy and the monitor displays somewhat faint wavy gray lines that can get annoying. I tried the monitor and cable with my laptop and there were no wavy lines on the screen. So apparently the cause is on the Gateway PC motherboard (mini case has no graphics card). I am wondering if the bad fan could be causing electromagnetic interference that could cause the way lines problem. The fan noise by itself doesnt really warrant the replacement of the power supply (about $60). |
#8
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
If dust has caused a fan problem, then the fan is probably
defective. Damaged either by excessive bearing wear - or just as likely - the hall effect sensor was not properly aligned. Latter results in too little torque meaning that even dust can cause problems. Too many want to cure symptoms rather than fix the problem. They foolishly blame dust when that dust only creates a symptom of the problem. Replacing a power supply fan - trivial and easy. BTW those who don't spend $60 retail for a new power supply are the same bean counter types who don't know of essential functions inside a power supply. Manufacturers have discovered a ripe and more profitable market selling inferior power supplies at $40 and less to computer assemblers who don't even know how electricity works. A supply not selling for at least $60 full retail is being marketed to the naive - dumped into that market at greater profits. Such inferior supplies can even cause other computer component failure. It was even standard 30 years ago - the power supply must not cause other component damage. But those 'dumped into the market' supplies market to bean counter types who never first learned underlying technology. Same applies to the fan. Dust should not cause failure of a properly working fan. Cleaning the fan would not solve the problem - only cure the symptom. Ben Myers wrote: Agreed. $60 for a replacement power supply is excessive. Fan noise is a sign of potential failure, due to dust and dirt that have gotten into the rotating parts. A blast of compressed air may dislodge the dust and dirt, and make the fan quieter and more reliable. Honestly, it is just not worth all the effort to replace a fan inside a power supply, despite what other postings claim. If you cannot fix the fan noise problem easily, and you can provide the dimensions of the power supply (and the pattern of the screw hole mountings), I may have a suitable and inexpensive replacement. ... |
#9
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
"w_tom" wrote in message ... If dust has caused a fan problem, then the fan is probably defective. Damaged either by excessive bearing wear - or just as likely - the hall effect sensor was not properly aligned. Latter results in too little torque meaning that even dust can cause problems. Too many want to cure symptoms rather than fix the problem. They foolishly blame dust when that dust only creates a symptom of the problem. Replacing a power supply fan - trivial and easy. For you maybe, consider just who may be reading this. And the dangers of sticking your hand in a PSU. BTW those who don't spend $60 retail for a new power supply are the same bean counter types who don't know of essential functions inside a power supply. Manufacturers have discovered a ripe and more profitable market selling inferior Utter bull****e, its a crap shoot, i have just as many 80$ fortans/ antec in the bin as ...codegens power supplies at $40 and less to computer assemblers who don't even know how electricity works. A supply not selling for at least $60 full retail is being marketed to the naive - dumped into that market at greater profits. Such inferior supplies can even cause other computer component failure. It was even standard 30 years ago - the power supply must not cause other component damage. But those 'dumped into the market' supplies market to bean counter types who never first learned underlying technology. As usual you are making huge assumptions here, you are NOT the only one who has electrical background. Making the 'price' the denominator in this decision is goofy. Same applies to the fan. Dust should not cause failure of a properly working fan. Cleaning the fan would not solve the problem - only cure the symptom. should not? Dust throws the balance of the fan off, then if its a bearing fan, the bearings make noise, then at some point they(metal ballbearings) rip up the 'plastic' race. Cause and effect. Ben Myers wrote: Agreed. $60 for a replacement power supply is excessive. Fan noise is a sign of potential failure, due to dust and dirt that have gotten into the rotating parts. A blast of compressed air may dislodge the dust and dirt, and make the fan quieter and more reliable. Honestly, it is just not worth all the effort to replace a fan inside a power supply, despite what other postings claim. If you cannot fix the fan noise problem easily, and you can provide the dimensions of the power supply (and the pattern of the screw hole mountings), I may have a suitable and inexpensive replacement. ... |
#10
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Noisy power supply fan in PC & gray wavy lines on CRT monitor
On Thu, 1 Dec 2005 10:48:32 -0800, "JAD"
wrote: "w_tom" wrote in message ... If dust has caused a fan problem, then the fan is probably defective. Damaged either by excessive bearing wear - or just as likely - the hall effect sensor was not properly aligned. Latter results in too little torque meaning that even dust can cause problems. Too many want to cure symptoms rather than fix the problem. They foolishly blame dust when that dust only creates a symptom of the problem. Replacing a power supply fan - trivial and easy. For you maybe, consider just who may be reading this. And the dangers of sticking your hand in a PSU. What danger? Unplug it first, it will be drained by the time the cover is unscrewed. Remaining danger is one of implementation, making sure wires are secured, not just twisted together and/or rubbing against the HV section components. Is easily enough done by observing the example set by manufacturer when original fan was installed, but like anything else if someone were to do it poorly it could be a problem, as is poor driving, poor lawn mowing, poor shoe-tying... all introduce risks if done improperly. BTW those who don't spend $60 retail for a new power supply are the same bean counter types who don't know of essential functions inside a power supply. Manufacturers have discovered a ripe and more profitable market selling inferior Utter bull****e, its a crap shoot, i have just as many 80$ fortans/ antec in the bin as ...codegens Not at all. While occasionally a better PSU will fail, it's far more likely due to the lower-margin components in the crap psu. However, if the antec or fortron is underspec'd for the system or treated abusively (like a user who just "decides" they want lower noise so they replace orig fan with a Panaflo @ 5V, then they're subject to same fate. power supplies at $40 and less to computer assemblers who don't even know how electricity works. A supply not selling for at least $60 full retail is being marketed to the naive - dumped into that market at greater profits. Such inferior supplies can even cause other computer component failure. It was even standard 30 years ago - the power supply must not cause other component damage. But those 'dumped into the market' supplies market to bean counter types who never first learned underlying technology. As usual you are making huge assumptions here, you are NOT the only one who has electrical background. Making the 'price' the denominator in this decision is goofy. Prices are sometimes arbitrary based on location, source, label on the unit, but in this case there is some truth to it. Ever seen a Foxconn/Allied mATX? Certainly not as good as a Antec or Fortron mATX. Perhaps if the original PSU had been a few dollars more expensive it would have had a better grade fan and thus the entire thread never existed. Same applies to the fan. Dust should not cause failure of a properly working fan. Cleaning the fan would not solve the problem - only cure the symptom. should not? Dust throws the balance of the fan off, or it could randomly make it slightly better balanced... but in general, given a uniform fan blade assembly rotating, it can be expected to fairly evently coat and not imbalance it to any significant extent. then if its a bearing fan, the bearings make noise, then at some point they(metal ballbearings) rip up the 'plastic' race. Bearings do not usually fail from ripping up a plastic race, rather the metal is imperfect and they begin rotating less and less until they just stop and slide around instead, further deforming at an ever-increasing rate. Cause and effect. Cause is usually a poor, low quality bearing, resolved by replacing fan with one similar to found in good power supplies, or use of the good PSU in the first place. |
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